Combined window lock and stop.



R. MURN.

COMBINED wmnow LOCK AND STOP.

APPLICATION FILED JULY 1, I915.

Patented Nov. 16, 1915.

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HUDQLP M URN, B y 74 Ww ATTORNEYS.

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COLUMBIA PLANOGRM'H COHWASHINGTON D. c.

RUDOLF MURN, 01? LAKEWOOD, OHIO.

COMBINED WINDOW LOCK AND STOP.

Application filed July 1, 1915.

To all whom it may concern Be it known that I, RUDoLF MURN, a citizen of the United States, residing at Lakewood, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Tmprovementsin a Combined WVindow Lock and Stop, of which the following 1s a specification.

This invention relates to a combined window lock and stop, all substantially as shown and described and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a perspective view of the corners of two window sashes in which my improved device is shown as open at both places. Fig. 2 is a central sectional elevation of the device in position as in Fig. l and showing the lower sash in full lines as locked and in dotted lines as engaged by the stopon the upper sash. Fig. 3 is a cross section on line 33, Fig. 2, looking down. Fig. 4 is an enlarged rear elevation of the stop mecha nism alone.

The device thus shown is both single and dual in function, the lower portion thereof serving as a lock for'the two sashes together,

and the upper portion serving to operate as a stop for the lower sash to prevent its being raised beyond a certain predetermined elevation, the limit being such that there will not be room for a person to crawl through the window when the sash is raised to this stop.

Having reference first to the sash look as such I begin with a plate a adapted to be secured by screws to the side of the upper sash over the recesses therein as shown, and.

in such relation to both sashes at their meeting portions as to make the catch 0 effective. The said catch is of the nature of a wing or lever with a head having a shoulder 2 at its bottom adapted to engage over and behind a cam3 on a plate 4 fixed directly on the top and corner of the lower sash and with said cam gradually deepened from its point of initial engagement toward its heel or rear, whereby when said lever'is swung horizontally around into engagement with said cam it will also draw the sashes together. The said lever is pivoted or hinged in the rear of said plate on hinges 5, and a notch or open slot 6 in said plate extending across the area of said pivot provides for swinging the said lever to open and retired positions, respectively. The open or Specification of Letters Patent.

Patented Nov. 16, 1915.

Serial No. 37,417.

engaging position of said lever is shown in full lines in several views and in closed or retired position in dotted lines,Fig. 1. In this position the head thereof is retired to the same plane as the plate a and the shank 7 of the lever occupies the said slot 6 so as to be clear to permit the movements of the sashes.

The mechanism at the top of plate a serves as a stop or check to the raising of the lower sash and the lowering of the upper sash farther than said stop permits, say in the neighborhod of six inches, making the window proof against entrance either at the bottom or the top when said stop is in open or engaging position. The plan of construction however also contemplates the entire closure or retirement of the device top and bottom, in which case both the catch c and the stop 5 are thrown back and the sashes are as free to move their full distance as if this device were not thereon. The said stop 8 is shown as formed from a solid block or piece of metal provided with a transverse lip 8 at its bottom adapted to engage in a recess 9 in cam 3 on the lower sash thus preventing possible opening of said stop from the outside when thus engaged, Fig. 2. Shaft 10 has a crank 12 at its upper end and a retracting spiral. spring 18 about its lower end engaged therewith and arranged to have a rotating effect on the said shaft. A right-angled push member 14 is projected through said plate a and has a slotted inner arm in engagement with said crank 12 to throw the stop back out of engaging or stopping position by rotating said shaft. To this end said push member 1-1 is in such relations with said parts that when said member is pressed back to 'be flush with the surface of plate a a partial turn of the said crank and said shaft will occur and the stop 8 will be rotated inward out of the way to the rear of said 15 can be slid down in front thereof and hold it back. The said keeper is a plate having dove-tailed engagement at its edges in a channel in plate a and adapted to slide down behind the stop a and prevent it from being turned back or closed from the outside, as seen in Figs. 1 and 2, but when the said stop is retired it is also adapted to slide down in front thereof and prevent the stop from being opened until it is again withdrawn. Thus, in Fig. 1 the stop is out in engaging position and locked by the plate so that the keeper keeper 15 when the said stop is retired after withdrawing said plate, and the sashes are free to berun up and down so far as the stop is concerned. Retirement of the stop is effected by pressing on the push crank 14:,

I which'rotates the shaft on which the stop is rigidly fixed and it is held there by such pressure until the keeper 15 is dropped.

The spring is arranged to exert constant rotary. tension on shaft 10 to throw the stop .9 outward, so that, the instant the keeper 'or slide 15 is withdrawn the said stop is automatically thrown out into its I be'rotated. The same occurs when the upper sash is lowered as far as it can go to afford ventilation at the top, the catch a being, retired in eitherinstance.

In taking the foregolng posltions it 1s necessary in either case to first retire the catch or wing c, which swings inward toward the glass, and which is free to be engaged by a finger to be swung out; The plate a will thus be seen to be. equipped with a complete sash control and the device as a whole constitutes a new article of manufacturefand sale, the wing 0 and its cam serving to lock the sashes together when closed and the stop above to limit their opening up or down.

In practice the stop is kept out or open, as in Figs. 1 and 2, even when the catch 0 1s engaged as a precaution against possible opening of thecatch by unauthorized parties. from the outside. Of course this is not regarded as ordinarily probable, but'if the catch were not engaged tightly on the cam it might be possible to enter a thin laded knife or the like and disengage the catch. In'suchcase the stop 5 stands as a sentinel to limit the opening and defeat intruders. Hence the plan of the invention and my in structions to purchasers is to always keep the stop out'as a positive safe guard against entrance, and the two parts 0 and 8 work together to effect perfect security.

What I claim is: g

A stop mechanism for windows conr prising a horizontally. rotatable stop member and a rotatable shaft on which said memsaid crank and adaptedto rotate said shaft.

Copies of this patent maybe obtained for 2. A stop mechanism for window sashes comprising a plate adapted to be fixed on the side of the upper sash and having a shaft rotatably mounted on the rear thereof and provided with a crank at one end and a spring adapted to rotate said shaft, a. push member operatively engaged with said crank and a sash stop fixed on said shaft and adapted to rotate into and out of stopping position.

8. In windows, an upper sash having a recess in the side thereof, a plate over said recess and a shaft rotatably mounted on the back of said plate having a crank at one end and a retracting spring on the other end and a sash stop fixed on said shaft between its ends, said plate having a slot transversely to permit said stop to rotate to and from stopping position, and a right angled push member having a slotted arm engaging said crank and projecting to the front of said plate.

4. A device as described having a plate adapted to be fixed to the side of an upper sash and a sash stop rotatably mounted on said plate and adapted to be retired behind the surface thereof, and a keeper slidablv mounted in said plate and adapted to confine said stop in open and closed positions.

5. A device as described comprising a face plate and a vertically disposed rotatable shaft on the rear thereof and a stop fixed on said shaf spring to rotate said shaft and throw said stop outward, and push mechanism engaged with said shaft and adapted to turn the same against the tension of said spring and retire said stop.

6. A device as described comprising a plate adapted to be fixed to the side of an upper window sash and provided with a transverse slot, a sash stop pivoted at the rear of said plate and adapted to be retired through said slot, and means to confine said stop in retirement.

7 In a sash stopping mechanism, a plate adapted to be secured to the side of an upper sash, a stop for the lower sash pivoted at the rear of said plate and said plate having a transverse slot through which said stop is adapted to be rotated out of the way of the lower sash, means to rotate said stop and means to confine the stop in both open and closed positions.

In testimony whereof I afiix my signature in presence of two witnesses.

RUDOLF MURN.

. Witnesses:

M. SCI-IWAN, Gno. E. Knroxnn.

fi-ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

